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Title: OpenCL miner written in C Post by: tcatm on February 05, 2011, 12:00:00 AM 552 Mhash/s on 5970 @ 725 MHz https://github.com/tcatm/oclminer This miner checks *all* solutions and doesn't throw away nonces like poclbm and DiabloMiner do to save bandwidth. Title: Re: OpenCL miner written in C Post by: Luke-Jr on February 05, 2011, 01:17:28 AM Unpatched, this gets me 124.5 MH/s on my Radeon HD 5850. With a patch from tcatm on IRC, I got up to 259.5 MH/s. Still short of m0m's 265 MH/s, but getting closer.
Title: Re: OpenCL miner written in C Post by: m0mchil on February 05, 2011, 06:53:05 AM tcatm, thank you for this miner.
Just wanted to mention that since yesterday (Feb 4) poclbm and Diablo miners changed the way of getting kernel results back to host, reducing lost results to below 0.03% (or even less). Title: Re: OpenCL miner written in C Post by: tcatm on February 05, 2011, 10:10:55 AM Here's a copy of my hacked SDK: http://dl.dropbox.com/u/10284953/sdk2.1-hacked.tbz2
Title: Re: OpenCL miner written in C Post by: tcatm on February 05, 2011, 11:05:31 AM Added poolmode (-m). Submits all H==0 results instead of only the best one.
Title: Re: OpenCL miner written in C Post by: tcatm on February 08, 2011, 12:55:38 PM update: miner now measures effective hashrate by inspecting actual results returned by GPU (instead of counting kernel runs). Returned hashrate is reliable after approx. 30 min runtime
Title: Re: OpenCL miner written in C Post by: dingus on February 09, 2011, 03:17:56 AM This miner checks *all* solutions and doesn't throw away nonces like poclbm and DiabloMiner do to save bandwidth. Could you explain this to a layman? What is significant about this? Thank you. :-* Title: Re: OpenCL miner written in C Post by: tcatm on February 09, 2011, 10:55:34 AM This miner checks *all* solutions and doesn't throw away nonces like poclbm and DiabloMiner do to save bandwidth. Could you explain this to a layman? What is significant about this? Thank you. :-* poclbm and DiabloMiner only check some of the returned results form GPU hoping that the GPU will not find too many possible solutions. They improved that in recent versions, though. So my miner is a little bit (about 0.015%) faster. It also features a special pool mode because of this, which is much more efficient when using a pool. Title: Re: OpenCL miner written in C Post by: dingus on February 09, 2011, 03:43:00 PM This miner checks *all* solutions and doesn't throw away nonces like poclbm and DiabloMiner do to save bandwidth. Could you explain this to a layman? What is significant about this? Thank you. :-* poclbm and DiabloMiner only check some of the returned results form GPU hoping that the GPU will not find too many possible solutions. They improved that in recent versions, though. So my miner is a little bit (about 0.015%) faster. It also features a special pool mode because of this, which is much more efficient when using a pool. Title: Re: OpenCL miner written in C Post by: cdb000 on February 09, 2011, 04:08:50 PM This miner checks *all* solutions and doesn't throw away nonces like poclbm and DiabloMiner do to save bandwidth. Could you explain this to a layman? What is significant about this? Thank you. :-* poclbm and DiabloMiner only check some of the returned results form GPU hoping that the GPU will not find too many possible solutions. They improved that in recent versions, though. So my miner is a little bit (about 0.015%) faster. It also features a special pool mode because of this, which is much more efficient when using a pool. When the miner handles a block of work in standalone mining mode you are only looking for one hash that meets the current target. Once you have found this hash you have generated the block and mined 50 Bitcoins. (Yippee!) There is no point continuing with the current work after one hash has been found as we are all now looking for the next block. When the miner handles a block of work in pooled mode you are looking for as many low difficulty hashes as possible to gain as many shares in the pool as possible. When you run your HD5870 over a block of work you want to send ALL the valid hashes it generates to the pool, not just the first one - it makes sense to continue working on a block of work even though a valid hash has been found because finding another hash will gain you another share in the pool most of the time. (most of the time because you might have found the hash that generates the block rendering any further hashes of the same block useless) So, when mining with a 5970 you want choose pool mode if you are in a pool such as Slush's pool, and not when you are mining for yourself. Hope this makes sense! Title: Re: OpenCL miner written in C Post by: dingus on February 09, 2011, 04:13:41 PM Ok, I see. Thanks for the clarification. ;D
Title: Re: OpenCL miner written in C Post by: martok on April 09, 2011, 03:39:17 AM Hi,
Just starting to look at this code. Finally a miner written in C so I can understand it. :) Anyways question about this pool mode idea. So, when in solo mode, I'm guessing we submit a block followed immediately by another getwork. What is the point in doing it this way when we could simply submit blocks as we do in pooled mode and let long-polling tell us when another block is ready? Also, what does that hacked SDK of yours actually do? Title: Re: OpenCL miner written in C Post by: jgarzik on April 09, 2011, 04:35:42 AM Anyways question about this pool mode idea. So, when in solo mode, I'm guessing we submit a block followed immediately by another getwork. What is the point in doing it this way when we could simply submit blocks as we do in pooled mode and let long-polling tell us when another block is ready? If you submitted a block in solo mode, then you presumably solved that block, meaning that a brand new block is ready and waiting for your next 'getwork'. Title: Re: OpenCL miner written in C Post by: kindle on April 09, 2011, 06:52:04 AM Hi I am trying to compile this using Borland compile in win 7. Reading tru online compilation guides I seem to have errors. Any thing I should take note of?
Title: Re: OpenCL miner written in C Post by: FnuGk on April 09, 2011, 05:28:45 PM i get this error on osx (using either makefiles).
Code: Last login: Sat Apr 9 19:22:53 on ttys002 Title: Re: OpenCL miner written in C Post by: jgarzik on April 09, 2011, 05:37:57 PM i get this error on osx (using either makefiles). Code: util.c: In function ‘json_rpc_call’: You are using a too-recent version of jansson. Either downgrade to 1.x, or add a '0' for the new flags parameter in 2.0. Title: Re: OpenCL miner written in C Post by: kindle on April 09, 2011, 06:07:31 PM You are using a too-recent version of jansson. Either downgrade to 1.x, or add a '0' for the new flags parameter in 2.0. Hi jgarzik sorry its my 1st time compiling, how do I include the 0 flag in the cygwin shell? make -o gives the same error 1. Title: Re: OpenCL miner written in C Post by: jgarzik on April 09, 2011, 06:14:53 PM You are using a too-recent version of jansson. Either downgrade to 1.x, or add a '0' for the new flags parameter in 2.0. Hi jgarzik sorry its my 1st time compiling, how do I include the 0 flag in the cygwin shell? make -o gives the same error 1. You must (a) edit the source code to add a flags parameter to json_loads() function call, or (b) you must downgrade your jansson library to 1.x. Title: Re: OpenCL miner written in C Post by: kindle on April 09, 2011, 06:20:09 PM Hi jgarzik
I just found this string in the util.c json_loads(all_data.buf, &err), how do i add the flag here? So sorry i have no background in prog. Thanks alot for the guide =) Title: Re: OpenCL miner written in C Post by: trentzb on April 09, 2011, 06:28:23 PM Hi jgarzik json_loads(all_data.buf, 0, &err)I just found this string in the util.c json_loads(all_data.buf, &err), how do i add the flag here? So sorry i have no background in prog. Thanks alot for the guide =) Title: Re: OpenCL miner written in C Post by: kindle on April 09, 2011, 06:35:21 PM trentzb thanks for the prompt reply, I edited the string and the error still exist. ???
Title: Re: OpenCL miner written in C Post by: trentzb on April 09, 2011, 06:48:02 PM Sorry, I got users mixed up. That was targeted to FnuGk's issue. I don't know about building on Windows.
Title: Re: OpenCL miner written in C Post by: kindle on April 09, 2011, 06:52:27 PM Hi trentzb, I am using cygwin and compiling using gcc so I assume should be the same as FnuGk?
Title: Re: OpenCL miner written in C Post by: trentzb on April 09, 2011, 07:57:55 PM What error(s) exactly are you getting?
Title: Re: OpenCL miner written in C Post by: kindle on April 09, 2011, 08:04:42 PM Hi trentzb, the link below is the read out.
http://pastebin.com/jeVuekYf (http://pastebin.com/jeVuekYf) Title: Re: OpenCL miner written in C Post by: trentzb on April 09, 2011, 08:54:19 PM You don't have jansson/opencl installed and/or don't have your env vars set up correctly.
Title: Re: OpenCL miner written in C Post by: kindle on April 09, 2011, 09:26:39 PM Hi trentzb, thanks for the guide. I will see what I can do. Thanks man!
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